What are the two forms of oxygen found in the atmosphere and how are they helpful for living organisms?
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The two forms of oxygen found in the atmosphere are: (i) Elemental oxygenis normally found in the form of diatomic molecule (O2) in the lower part of atmosphere. It is about 21% in the air and non-poisonous. (ii) Ozone is found in the stratophere part ofatmosphere. It contains three atoms ofoxygen (O3).
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O2 - many organisms need this form of oxygen to breathe.
O3- this form of oxygen is in the ozone layer. It protects humans especially from UV rays.
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